AMSOIL Z-ROD™ Synthetic Motor Oil is specially engineered for classic and high-performance vehicles. It features a high-zinc formulation to prevent wear on flat-tappet camshafts and other critical engine components, along with a proprietary blend of rust and corrosion inhibitors for added protection during long-term storage.

Product Description
AMSOIL Z-ROD™ Synthetic Motor Oil is specially engineered for classic and high-performance vehicles. It features a high-zinc formulation to prevent wear on flat-tappet camshafts and other critical engine components, along with a proprietary blend of rust and corrosion inhibitors for added protection during long-term storage. Z-ROD Synthetic Motor Oil is designed to perform on the street and protect during storage.

AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.

Protects Flat-Tappet Cams
The lifters and cam lobes on flat-tappet camshafts common to classic and high performance vehicles slide rapidly against one another, producing high friction and heat. The friction between the two components can eventually wear down the cam and affect valve operation, ultimately resulting in lost engine power and reduced efficiency. In addition, these areas are splash-lubricated rather than pressure lubricated like other areas of the engine, which adds extra strain on anti-wear additives like the zinc and phosphorus in zinc dialkyldithiophosphate (ZDDP).

Provides Long-Term Protection from Rust & Corrosion
AMSOIL Z-ROD Synthetic Motor Oil is formulated with a unique blend of rust and corrosion inhibitors to ensure maximum protection during long-term storage. To prove its effectiveness, AMSOIL submitted Z-ROD Synthetic Motor Oil to the Standard Test Method for Rust Protection in the Humidity Cabinet (ASTM D-1748). This test evaluates the rust-preventative properties of oil under high-humidity conditions, similar to those faced by a covered hot rod in a damp garage. The metal coupon treated with AMSOIL Z-ROD Synthetic Motor Oil showed no signs of oxidation after 192 hours, while the coupon treated with a leading competitor’s product failed the test after 24 hours.

COMPATIBILITY
AMSOIL Z-ROD Synthetic Motor Oils are compatible with conventional and other synthetic motor oils. Mixing AMSOIL Z-ROD Synthetic Motor Oils with other oils, however, will shorten the oil’s life expectancy and reduce the performance benefits. Aftermarket oil additives are not recommended for use with AMSOIL Z-ROD Synthetic Motor Oils.

SERVICE LIFE
Because engines in classic cars, hot rods and other performance vehicles are generally modified, a universal oil drain interval recommendation for these applications cannot be given. Responsibility for determining the drain interval duration rests with the owner. As a general service guideline, the maximum drain interval for Z-ROD Synthetic Motor Oil should not exceed 5,000 miles or one year, whichever comes first. In heavily modified engines (e.g. forced induction, nitrous) the maximum drain interval should not exceed 3,000 miles or one year, whichever comes first.

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).

Did this product meet your expectations?

Great product

I have two older cars with flat tappet equipped engines. the Z-Rod oil is perfect for this application. Plus being a full synthetic oil, I know my engines are getting the best lubrication and protection available. As an aside, I also use Amsoil in my newer cars, not Z-Rod though!

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

February 19th, 2018 at 10:18 am

Reviewed by Wano:

Always use amsoil

I have a 1955 Chevy 2dr sedan, with 383 strokerMotor.Feel comfortable using zrod in it

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

February 9th, 2018 at 11:17 pm

Reviewed by Don:

First time use

This is the first time using Z-Rod motor oil in my restomod 69 GTO prior to being stored for the winter. So far, looks like a good product, but need time to see how it performs over the next year.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

November 30th, 2017 at 5:11 am

Reviewed by Papadoc:

I would buy this product again and highly recommend!

Use in my antique flat tappet engines and motorcycles from the 70's. Great engine protection.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

November 27th, 2017 at 9:36 am

Reviewed by Nec:

The only oil I use in my 1949 Kaiser.

I don't drive my Kaiser much, but using Amsoil Zrod oil I only need to change my oil once a year. This oil protects my flat tappet cam.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

November 8th, 2017 at 1:01 pm

Reviewed by chris craft lover:

z rod 20w/50 best oil for my boats

I switched my vintage 327f motors over to this oil in the spring - just did my winter oil change and love this product and the service I receive - ordered on a Monday arrived on the door step Wednesday ..great product and great customer service - thank you

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

October 11th, 2017 at 9:52 am

Reviewed by Joe:

So far so good

Trying it out on my air cooled VW buggy. Have only gone 200 miles but already noticed my oil pressure is 5-10 lbs better at idle on 90 degree day.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

September 28th, 2017 at 1:01 pm

Reviewed by Flexw:

Great Motor Oil

I use the ZRod in my VW Super Beetle with it's Flat Four brand new engine. Excellent lubricant with Zinc additive for breaking in the valve

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

August 31st, 2017 at 10:33 am

Reviewed by Jerry:

Great Oil

Just what I need for my old school VW!

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

July 26th, 2017 at 11:52 am

Reviewed by Jason:

Nothing but the best for my 77 Corvette.

Best oil period for my original flat tappet L-82 Corvette.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

May 25th, 2017 at 12:01 pm

Reviewed by Easy:

Excellent zinc based oil

Bought this for a friend,he was looking for zinc based oil.Engine has solid roller camshaft.Mostly street duty,with some racing.He's ready to buy more amsoil products for his other vehicles!!!

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

May 22nd, 2017 at 12:55 pm

Reviewed by Ike:

Will buy this oil again!

I have used this in my 1987 Silverado 5.0 with 250,000 miles on it for the last 20 years and, I still get 4500 miles to a quart and the engine is still quiet and has never been opened. Very happy with Amsoil!

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

April 15th, 2017 at 1:10 am

Reviewed by TINY:

GREAT PRODUCT

ALL THE PRODUCTS PREFORM AS EXPECTED

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

April 14th, 2017 at 5:07 am

Reviewed by Fritz:

I love zrod

I use this in my 90k mile evo to help combat the effects for e85

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

January 23rd, 2017 at 1:43 pm

Reviewed by Niles:

20/50 z rod in my Dart

I drive my 68 Dart 2 dr sedan constantly !!!! Literally !!!! It is small block mild with 3 speed auto. And Z Rod Is All I run It Along With Synthetic oil filter and go air filter all AMS Oil Products!!! Recommend it to Everyone !!

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

January 8th, 2017 at 11:29 am

Reviewed by RICHIE:

Z-Rod Pro Street Oil.

Use this in my 1934 Ford Pro Street Pickup, With a 406 Small Block Chevy making in excess of 500 HP, Run it in very Hot Weather in the summer going to car Shows and Cruise nights, Preforms well with this oil, no problems at all, Love it.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

December 27th, 2016 at 1:02 am

Reviewed by Nikke:

Cure for flat tappits!

The best for vintage engines!

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

December 16th, 2016 at 11:58 am

Reviewed by Timothy:

Good for valve clatter.

Used this in 2 engines. Air cooled 911 and my S32 engined E24 M6. Both seem to enjoy the thicker oil and seems to quiet valve clatter. Very pleased.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

December 11th, 2016 at 10:03 am

Reviewed by Mike:

GREAT PRODUCTS!

I have a 1989 Toyota pickup that I have owned since new. I use only Amsoil products in my vehicles and am happy to say that the old pickup has 370,000 miles now and still runs like it did when new. Consider me a very, very happy customer!

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

September 10th, 2016 at 7:10 am

Reviewed by g:

Z-ROD oil

I switched to ZROD oil for my vintage gto mainly for the zinc/phosphorus content. when I did I changed from a competitors 10w40 to amsoil 20w50 because of oil usage (believed to be valve seal related) and oil consumption decreased significantly.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

September 6th, 2016 at 9:33 am

Reviewed by MuscleCarBuilder:

I would not buy this product again

They say it's designed for older engines but it's not. Once your engine is at operating temperature the oil pressure drops below 10psi at idle because the oil is just too thin.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

August 31st, 2016 at 1:52 pm

Reviewed by Jim:

Nothing much to review, I bought some oil

Used in a hot rod

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

August 29th, 2016 at 1:54 pm

Reviewed by donnie:

classic car oil

purchased a few cases for my triumphs ..i've been running tr6's since the 80's in northern canada ..zrod with it's storage protection /zinc and 20/50 keeps my precision rebuilt engines in good health

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

August 29th, 2016 at 1:12 pm

Reviewed by Tom:

Z-ROD 20w-50

This oil has lots of ZDDP. To protect my Cam and lifters. The 20W-50 I like because l run it in my air cooled engine. Even on a hot day with the Engine at temp of 280' I still have 30# of oil pressure. I also run Amsoil gear lube in the transaxle. I'm sold Amsoil products.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

August 29th, 2016 at 1:09 pm

Reviewed by Subwaync:

Longtime Amsoil User

I've driven VW Super Beetles for the last 35 years, and once the engines are broken in I've always switched over to Amsoil. And considering that I lived in the Southwest all of that time and 1st generation VW's are only cooled by Air and Oil; it made Amsoil a must. With it's ability to keep engine temps much lower and wear and tear down to a minimum it's been an easy decision.

Item Reviewed: AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

August 29th, 2016 at 11:39 am

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